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Ultrasonic transmitter/receiver by pulse compression

A transceiver device, pulse compression technology, applied in the direction of using ultrasonic/sonic/infrasonic, ultrasonic/sonic/infrasonic diagnosis, ultrasonic/sonic/infrasonic generation, etc., can solve the problem of poor image quality and impracticality

Inactive Publication Date: 2005-07-13
JAPAN SCI & TECH CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if probes that transmit and receive separately are used, only signals from the range where the transmitted ultrasonic beam and the receptive area of ​​the receiving transducer intersect can be detected, and the resulting image quality is not very good.
In addition, in the reception where the transmission signal and the reception signal are mixed, an amplifier with a very large dynamic range is required, so it is not practical.

Method used

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  • Ultrasonic transmitter/receiver by pulse compression
  • Ultrasonic transmitter/receiver by pulse compression
  • Ultrasonic transmitter/receiver by pulse compression

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Comparison scheme
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Embodiment Construction

[0038] The best mode for carrying out the present invention will be described in detail with reference to the drawings.

[0039] [Separation of sending signal and receiving signal in time]

[0040] First, the temporal separation of ultrasonic transmission signals and reception signals will be described.

[0041] In the present invention, a flexible waveguide type transmission line is used for the separation area for time separation.

[0042] Such as figure 1 As shown, the L(0,1) mode and the L(0,2) mode or the L(0 , 3) the transmission characteristics of the mode (referring to Journal of Electronic Communications Society, Vol.J69-A, No.8, pp.1006-1014, 1986, Journal of Electrical Society, Vol.109-C, No.8, 1989, pp. 581-586). In addition, the L(0,1) mode and the L(0,2) mode or the L(0,3) mode refer to a longitudinal wave among elastic waves propagating along a rod of a cylindrical elastic body and there is no changing waves. In order from the simplest mode, they are calle...

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Abstract

An ultrasonic transceiver based on pulse compression is provided. As shown in Fig. 2 (a), in the present invention, use for example the end face diameter of one side of bonding ultrasonic probe to be 0.58mm, the diameter in the thinnest part is 0.3mm, the end face diameter at the sample side is 0.68mm, The length is the quartz rod (20) of 38cm, makes the diameter of the installation ultrasonic transducer (10) side of fused silica rod (20) be in the range that the conversion efficiency of L(0,3) mode is good like this, in addition, contact test The diameter of the quartz rod (20) on one side of the sample (50) is sufficiently large compared to the wavelength, and the other portion is made sufficiently thin so that flexibility can be obtained. The transmission waveform and the reception waveform are shown in FIG. 2( b ).

Description

technical field [0001] The present invention relates to an ultrasonic transmitting and receiving device used for ultrasonic measurement and imaging in the fields of medicine and ultrasonic measurement, and particularly relates to an ultrasonic transmitting and receiving device based on pulse compression. Background technique [0002] Measurements or images have been performed using reflected waves of ultrasonic waves and the like for a long time. For example, in an ultrasonic diagnostic apparatus, a shock wave is emitted from an ultrasonic vibrator, a reflected echo from a body is received, and a tomographic image in the body is obtained through image processing. In such an ultrasonic diagnostic apparatus, the deepest possible depth and high resolution are required. [0003] There is pulse compression technology as a technology that satisfies this requirement. This is to implement FM modulation on the transmitted ultrasonic signal (hereinafter, the signal is referred to as...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61B8/00A61B8/06A61B8/12G01B17/00G01N29/24G01N29/28G01N29/34G01N29/44G01P5/24G01S7/52G01S13/28G01S15/89
CPCA61B8/06A61B8/12A61B8/4281G01B17/00G01N29/2462G01N29/2468G01N29/28G01N29/348G01N29/4436G01N2291/017G01N2291/101G01P5/24G01S7/52047G01S13/28G01S15/8959G01S15/8961G01S15/8979
Inventor 守屋正田川憲男
Owner JAPAN SCI & TECH CORP